Air feed for hot-air heating apparatus



June 24, 1930. E. G. MILLER AIR FEED FOR HOT AIR HEATING APPARATUS Filed May 8, 1929' Fatented June 24, 1930 UNITED STAES EDWARD G. MILLER, 01 14;.

3D ems, MIIGAH AIR FEED FOR HOT-AIR HEATING APPARATUS Application filed May 8, 1929. Serial No. 361,501.

Second, to provide a structure having these advantages which may be readily applied to hot air furnaces of standard and extensively used types.

Third, to provide a structure of the class described which is very simple and economical in structure and not likely to become in- 1 operative in use,

Objects pertaining to details and economies of my invention will definitely appear from the description to follow. The invention is defined in the claims.

I A structure embodying the features of my invention is clearly illustrated in the accompanyingdrawing, in which: V

Fig. 1 is a fragmentary elevation of a hot air furnace embodying the features of my invention, partially in vertical section on a line corresponding to the broken line 1-1 of Fig. 2.

Fig. 2 is a detail view partially in section on line 2-2 of Fig. 1.

Fig. 3 is afra entary view in vertical section of a modi ed form of my invention.

Referring to the drawing, 1 represents the casin of a hot air furnace and 2 the heatin cham er thereof. The structural details 0 the furnace and the casing are not illustrated as they form no part of this invention.

At one side of the casin I arrange an air intake chamber 3, the si e of the casing 1 having a segmental opening 4 therein '40 through which air may pass from the intake chamber into the casing.

preferably of c 'derable length, the intake chamber being the side of the casmg.

5 represents a col air gravity feed in-, take p1 e for the intake chamber which is prefera ly connected to the top of the intake chamber at the rear thereof. baflie or partial partition wall 6 depends from the top of the intake chamber in front of this graving This opening 4 is designed to fit around v embody or adapt my. improvements as may ity feed inlet. The lower edge of the partition, however, is substantially spaced from the bottom of the casing providing a gravity passage 7 along the bottom of the intake chamber.

chargev pipe 9 into the intake chamber and through the partition 6. The inner end of this discharge pipe is directed downwardly. Below the discharge pipe I mount a damper 10, the pivot 11 of which is horizontally disposed. This damper normally lies in a horizontal position shown in Fi 1, but may be swung to closed position shown'in Fig. 3

I preferably mount a blower 8 on the out- 1355 side of the intake chamber extending its diswith its rear end in operative relation to the lower edge of the partition 6 and its front edge resting on the bottom of the chamber. The damper is connected by a link 12 to an arm 13 on the pivot pin of the vane 14 arranged within the discharge pipe so that when the blower is in operation this vane is acted upon by the blast of air and actuates or swings the damper to its closed position. The damper projecting in front of the discharge pipe serves as a deflector or s readplate for the blast of air directe uniformly throu h the air heating chamber.

In the mo 'fication shown in Fig. 3 the blower designated by the numeral 15 is arranged within a housing 16 constituting a part of the intake chamber, the gravity feed conduit 17 opening to the top of this housing. The housing 16 is connected to a unit 18 carrying baflie wall 6 and on which the damper is mounted.

In. ither embodiment of my invention the parts are economical to produceandreadily assemble in operative relation tothe furnace.

I have not attempted to illustrate or describe other embodiments or adaptations of my improvements as I believe the disclosure made, will enable those skilled in the art to be desired.

Having thus described my invention what Iclaim as new and desire to secureby'Letters Patent is:

1. The combination with an air heating chamber, of an air intake chamber opening to said heating chamber and provided with a gravity feed air'inlet opening at the rear thereof, said intake chamber being provided with a partition wall extending transversely across its upper portion at the front of said air inlet opening to permit the flow of gravity feed air below it, a blower provided with a discharge pipe disposed through said partition to deliver at the front thereof, a damper provided below said blower discharge pipe" and arranged to swing to a forwardly inclined position with its rear end coacting with the lower end of said partition and its front end with the bottom of the chamber to close the gravity feed passage, a vane pivotally mounted within said blower discharge pipe and provided with an arm, and a link connecting said arm to said damper whereby the damper is actuated by said vane to closed position when the blower is in operation.

2. The combination with an air heating chamber, of an air intake chamber opening to said heating chamber and provided with a gravity feed air inlet opening at the rear thereof, said intake chamber being provided with a partition wall extending transversely across its upper portion at the front of said air inlet opening to permit the flow of gravity feed air below it, a blower provided with a discharge pipe disposed through said partition to deliver at the front thereof, a damper pivoted below said blower discharge pipe and arranged to swing to a forwardly inclined position with its rear end coacting with the lower end of said partition and its front end'with the bottom of the chamber to close the gravity feed passage, and a, vane pivotally mounted within said blower discharge pipe and operatively connected to said damper whereby the damper is actuated by said vane to closed position when the blower. is in operation.

3. The combination with an air heating chamber, of an air intake chamber opening to said heating chamber and provided with a bafiie wall constituting a partial partition and with a gravity feed air inlet at the rear of said bafiie wall, a blower provided with a discharge pipe disposed through said bafiie wall to deliver at the front thereof, a damper mounted on a horizontally disposed pivot below said blower discharge pipe and arranged to swing to a forwardly inclined posi tion into coacting relation to the said bafile wall to close the gravity air passage, a vane pivotally mounted within'said blower dis charge pipe and provided with an arm, and a link connecting said arm to said damper whereby the damper, is actuated by the said vane to closed position when the blower is in operation.

4. The combination with an air heating chamber, of an air intake chamber opening to said heatingchamber and provided with a bafiie wall constituting a partial partition and with a gravity feed air inlet at the rear of said bafiie wall, a blower provided with a discharge pipe disposed to deliver at the front of said bailie wall, a damper mounted on a horizontally disposed pivot below said blower discharge pipe and arranged 'to swing into coacting relation to the said baffle wall to close the gravity air passage, and a vane associatedv with said blower discharge pipe and operatively connected to said damper whereby the damper is actuated by the said vane to closed position when the blower is in operation. 5. The combination with an air heating chamber, of an air intake chamber communicating with said heating chamber and provided with a gravity air inlet and with a partial partition at the front of said gravity air inlet, a blower provided with a discharge pipe delivering at the front of said partition, a damper mounted on a horizontal pivot below said blower discharge pipe to swing to a forwardly inclined closed position with its rear end coacting with the lower end of said partition and its front end with the bottom of the chamber to close the gravity passage, and a vane pivotally mounted within said blower discharge pipe and operatively connected to said damper whereby the damper is actuated by said vane to closed position when the blower is in operation.

6. The combination with an air heating chamber, of an air intake chamber communicating with said heating chamber andprovided with a gravity air inlet and with a partial partion at the front of said gravity air inlet, a blower provided with a discharge pipe delivering at the front of said partition, a damper mounted on a horizontal pivot below said blower discharge pipe coacting with said partition to close the gravity passage, and a vane operatively associated with said blower discharge pipe and operatively connected to said damper whereby the damper is actuated by said vane to closed position when the blower is in operation. I

7. The combination with an air heating chamber, of an air intake chamber communicating with-said heating chamber and provided with a discharge pipe delivering to said intake chamber at a point in advance of said gravity air inlet, a damper mounted on a horizontal pivot below said blower d1scharge pipe to swing to a forwardly inclined position when in closed position and adapted to check the flow of gravity air through said inlet chamber, and a vane pivotally mounted within said blower discharge pipe and operatively connected to said damper whereby the damper is actuated by said fan to closed position when the blower is in operation.

8. The combination with an air heating chamber, of an air intake chamber communicating with said heating chamber and provided with a gravity air inlet, a blower provided with a discharge pipe delivering to said air inlet chamber at a point in advance of its gravity inlet, a damper mounted in said chamber and adapted when closed to check the gravity air passage at a point at the rear of the blower discharge, said damper when closed lying in a forwardly inclined position and constituting a deflector for the air discharged from said pipe, and a vane operatively associated with said discharge pipe to receive the blast therefrom and operatively connected to said damper whereby the damper is actuated to closed position when the blower is in operation.

9. The combination with an air heating chamber, of an air intake chamber communicatin with said heating chamber and provided with a gravity air inlet, a blower provided with a discharge pipe delivering to said air inlet chamber at a point in advance of its gravity inlet, a damper mounted in said chamber and adapted when closed to check the gravity air passage at a point at the rear of the blower discharge pipe, and a vane operatively associated with said discharge pipe to receive the blast therefrom and operatively connected to said damper whereby the damper is actuated to closed position when the blower is in operation.

In witness whereof I have hereunto set In hand.

EDWARD G'. MILLER. 

